Loads

Dynamic loads

Compared to a typical rolling bearing, where the outer ring is fully supported in a housing, a track runner bearing has only a small contact area between its outside surface and the track. The actual contact area depends on the applied radial load and the profile of the runner surface. Deformation of the outer ring, caused by this limited contact, alters the load distribution in the bearing, which affects load carrying capacity. The basic load ratings listed in the product tables take this into account. The ability to accommodate dynamic loads depends on the requisite life, but it is also important to consider the strength of the outer ring. Therefore, the value of the maximum permissible dynamic radial load Fr max (→ product table) should not be exceeded.

Static loads

The permissible static load for a track runner bearing is determined by the smaller of the values F0r max and C0 (→ product table). If requirements for smooth running are below normal, the static load may exceed C0, but should never exceed the maximum permissible static radial load F0r max.

Axial loads

The flange rings enable cam followers to accommodate axial loads that are induced when operating in an inclined or tilted position. The magnitude of permissible load depends on the internal design.

The weight of the components supported by the bearing, together with external forces, generally exceed the requisite minimum load. If this is not the case, the bearing must be subjected to an additional radial load.